134 Australian Polyzoa. 



QueensclifF, on Laininaria, a single specimen. 



This species bears some resemblance to L. Diadema, from 

 which it is distinguished by the areolation of the cells and the 

 single avicularium at the side of the mouth, the mandible of 

 which is long and directed downwards. 



L. trifolium. 



Cells distinct, irregular in shape, frequently oval, granular; 

 mouth trifoliate, the angles of the trefoil frequently pro- 

 duced into spines. Avicularia, when present, by the side of 

 the mouth, mandible long, pointed. Ovicell of moderate 

 size, globular, granular. 



On shells, stones, and algaa, probably common. 



L. larvalis. 



Cells elongated, confused, pierced towards the base by a 

 variable number of foramina ; two large openings about the 

 middle of the cell, with a prominent ridge running between 

 them to the point of the much projecting, triangular lower 

 lip ; mouth arched above, and frequently with a spine on 

 either side on the angle of junction of the upper and under 

 lips. Avicularia large, on the side of a cell below one of 

 the large openings. 



On Sargassum and other algas, probably common. 



L. circinata. 



Cells smooth in front, with a row of stelliform pores 

 round the edge, extending also above the mouth ; mouth 

 with two or three spines above, lower lip straight with a 

 minute notch. Ovicell adnate to the cell above, very slightly 

 grooved on its upper border. 



QueensclifT, on algas. 



Closely resembles L. Malusii, from which it differs in the 

 absence of the central lunate pore, in the notch in the lower 

 lip, and the very faint grooving of the ovicell. 



L. papillifera. 



Cells ovate, distinct, surface covered with numerous hollow 

 granulations or papillae ; mouth usually with several hollow 

 processes and with the lower lip much produced. Ovicell 

 large, round, and covered with hollow granulations like those 

 of the ordinary cells. 



Williamstown, on algae. 



This species is distinguished by the whole surface of the 

 cells and ovicells being covered with short, round, irregular 

 papillaa. 



